I'd probably go with Argent Dawn/Crusade too, or maybe even Shattered Sun, they are about fighting demons after all! The AB tabard could work too, unless the yellow/gold is too much for your your normal colored plate-look. Aye I'm sure it looks better in game, it definitely doesn't look out of place enough for me to scream out for you to replace it ^.^ Implementing a coloring-tool would be a gift from God.